Method and system for correcting spectrograph wavelength shift

Abstract

The invention relates to a method and system for correcting spectrograph wavelength shift. The method comprises the steps that: a, to-be-corrected pixel points and corresponding spectral signals thereof of standard gas characteristic absorption bands of detected gas are collected by a to-be-corrected spectrograph; b, to-be-corrected pixel points of absorption peak points in the standard gas characteristic absorption bands are determined through the spectral signals; c, a correction factor is obtained by matching the to-be-corrected pixel points of the absorption peak points and the pixel points in reference corresponding relationship of the absorption peak points, and the datum corresponding relationship of the absorption peak points is a datum corresponding relationship of the absorptionpeak points and the pixel points in the standard gas characteristic absorption bands of detected gas collected by the corrected spectrograph; and d, the pixel points of the detected gas collected by the to-be-corrected spectrograph are corrected by the correction factor. The method for correcting the spectrograph wavelength shift has wide coverage and is suitable for wavelength correction of spectrographs with a plurality of types and wavelength ranges.

Description

technical field [0001] The invention generally relates to the field of spectrometer calibration, in particular to a method and system for correcting the wavelength drift of a spectrometer. Background technique [0002] During the application of the spectrometer, due to the vibration of the instrument or the vibration and collision during transportation, the detector of the spectrometer will move, and the mechanical structure will have a certain deformation. At this time, the corresponding relationship between the pixels of the spectrometer and the detected wavelength is Deviations will occur, and the signal-to-noise ratio and detection limit of the spectrometer will deteriorate. [0003] Generally, the spectrometer is corrected by a mercury lamp. The method specifically includes: firstly, determining whether the wavelength signal of the spectrum has been shifted, and then correcting through the corresponding relationship between a specific wavelength and a pixel point. Howe...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to quickly solve the problem of spectral drift caused by vibration and mechanical deformation of the spectrometer at the application site, and to provide a method and system for correcting the wavelength drift of the spectrometer

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